Biological reaction cell



FIG. 1 is a front perspective view of a biological reaction cell embodying our new design;

FIG. 2 is right end view thereof;

FIG. 3 is a left end view thereof;

FIG. 4 is a left side view thereof; the right side view being identical thereto;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a biological reaction cell, substantially as shown and described. 